I was pretty much the same after a few tries. Summoned the skeleton shieldbros and they stunlocked her hard. I let her kill me when it was apparent that I’d barely have to try. Proceeded to solo her but it was a miserable experience for a few hours until I finally cracked her. Learning her patterns and soloing her is def fun.
Full fight here: https://www.xbox.com/play/media/ddkXY5shAE